<template>
	<view v-if="goods_info.goods_name" class="goods-detail-container">
		<view>
			<!-- 轮播图区域 -->
			<swiper :indicator-dots="true" :autoplay="true" :interval="3000" :duration="1000" :circular="true">
				<swiper-item v-for="(item, i) in goods_info.pics" :key="i"><image :src="item.pics_big" @click="preview(i)"></image></swiper-item>
			</swiper>
			<!-- 商品信息区域 -->
			<view class="goods-info-box">
				<!-- 商品价格 -->
				<view class="price">￥{{ goods_info.goods_price }}</view>
				<!-- 信息主体区域 -->
				<view class="goods-info-body">
					<!-- 商品名称 -->
					<view class="goods-name">{{ goods_info.goods_name }}</view>
					<!-- 收藏 -->
					<view class="favi">
						<uni-icons type="star" size="18" color="gray"></uni-icons>
						<text>收藏</text>
					</view>
				</view>
				<!-- 运费 -->
				<view class="yf">快递：免运费--{{ cart.length }}</view>
			</view>
			<!-- 商品详情信息 -->
			<rich-text :nodes="goods_info.goods_introduce"></rich-text>
			<!-- 商品导航组件 -->
			<view class="goods_nav">
				<!-- fill 控制右侧按钮的样式 -->
				<!-- options 左侧按钮的配置项 -->
				<!-- buttonGroup 右侧按钮的配置项 -->
				<!-- click 左侧按钮的点击事件处理函数 -->
				<!-- buttonClick 右侧按钮的点击事件处理函数 -->
				<uni-goods-nav :fill="true" :options="options" :buttonGroup="buttonGroup" @click="onClick" @buttonClick="buttonClick" />
			</view>
		</view>
	</view>
</template>

<script>
import { mapState, mapMutations, mapGetters } from 'vuex';
export default {
	data() {
		return {
			goods_info: {},
			// 左侧按钮组的配置对象
			options: [
				{
					icon: 'shop',
					text: '店铺'
				},
				{
					icon: 'cart',
					text: '购物车',
					info: 2
				}
			],
			// 右侧按钮组的配置对象
			buttonGroup: [
				{
					text: '加入购物车',
					backgroundColor: '#ff0000',
					color: '#fff'
				},
				{
					text: '立即购买',
					backgroundColor: '#ffa200',
					color: '#fff'
				}
			]
		};
	},
	computed: {
		...mapState('m_cart', ['cart']),
		...mapGetters('m_cart', ['total'])
	},
	onLoad(opiton) {
		const goods_id = opiton.goods_id;
		this.getGoodsDetail(goods_id);
	},
	methods: {
		async getGoodsDetail(id) {
			const res = await uni.$http.get('/api/public/v1/goods/detail', { goods_id: id });
			if (res.data.meta.status != 200) return uni.$showMsg();
			this.goods_info = res.data.message;
		},
		preview(i) {
			uni.previewImage({
				current: i,
				urls: this.goods_info.pics.map(x => x.pics_big)
			});
		},
		onClick(e) {
			if (e.content.text == '购物车') {
				uni.switchTab({
					url: '/pages/cart/cart'
				});
			}
		},
		...mapMutations('m_cart', ['addToCart']),
		buttonClick(e) {
			if (e.content.text == '加入购物车') {
				// 2. 组织一个商品的信息对象
				const goods = {
					goods_id: this.goods_info.goods_id, // 商品的Id
					goods_name: this.goods_info.goods_name, // 商品的名称
					goods_price: this.goods_info.goods_price, // 商品的价格
					goods_count: 1, // 商品的数量
					goods_small_logo: this.goods_info.goods_small_logo, // 商品的图片
					goods_state: true // 商品的勾选状态
				};				
				this.addToCart(goods);
			}
		}
	},
	watch: {
		total :{
			// immediate 属性用来声明此侦听器，是否在页面初次加载完毕后立即调用
			      immediate: true,
			handler(newValue){
				const findresult = this.options.find(x => x.text == '购物车');
				if (findresult) {
					findresult.info = newValue;
				}
			}
			
		}
	},
	
};
</script>

<style lang="scss">
swiper {
	height: 750rpx;

	image {
		width: 100%;
		height: 100%;
	}
}
// 商品信息区域的样式
.goods-info-box {
	padding: 10px;
	padding-right: 0;

	.price {
		color: #c00000;
		font-size: 18px;
		margin: 10px 0;
	}

	.goods-info-body {
		display: flex;
		justify-content: space-between;

		.goods-name {
			font-size: 13px;
			padding-right: 10px;
		}
		// 收藏区域
		.favi {
			width: 120px;
			font-size: 12px;
			display: flex;
			flex-direction: column;
			justify-content: center;
			align-items: center;
			border-left: 1px solid #efefef;
			color: gray;
		}
	}

	// 运费
	.yf {
		margin: 10px 0;
		font-size: 12px;
		color: gray;
	}
}
.goods-detail-container {
	// 给页面外层的容器，添加 50px 的内padding，
	// 防止页面内容被底部的商品导航组件遮盖
	padding-bottom: 50px;
}

.goods_nav {
	// 为商品导航组件添加固定定位
	position: fixed;
	bottom: 0;
	left: 0;
	width: 100%;
}
</style>
